uml: tidy kern_util.h

Tidy kern_util.h.  It turns out that most of the function declarations
aren't used, so they can go away.  os.h no longer includes
kern_util.h, so files which got it through os.h now need to include it
directly.  A number of other files never needed it, so these includes
are deleted.

The structure which was used to pass signal handlers from the kernel
side to the userspace side is gone.  Instead, the handlers are
declared here, and used directly from libc code.  This allows
arch/um/os-Linux/trap.c to be deleted, with its remnants being moved
to arch/um/os-Linux/skas/trap.c.

arch/um/os-Linux/tty.c had its inclusions changed, and it needed some
style attention, so it got tidied.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 files changed, 46 insertions, 64 deletions

diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile
index 8e129af..8a48d6a 100644
--- a/arch/um/os-Linux/Makefile
+++ b/arch/um/os-Linux/Makefile
@@ -4,7 +4,7 @@
 #
 
 obj-y = aio.o elf_aux.o execvp.o file.o helper.o irq.o main.o mem.o process.o \
-	registers.o sigio.o signal.o start_up.o time.o trap.o tty.o uaccess.o \
+	registers.o sigio.o signal.o start_up.o time.o tty.o uaccess.o \
 	umid.o tls.o user_syms.o util.o drivers/ sys-$(SUBARCH)/ skas/
 
 obj-$(CONFIG_TTY_LOG) += tty_log.o
@@ -12,7 +12,7 @@ user-objs-$(CONFIG_TTY_LOG) += tty_log.o
 
 USER_OBJS := $(user-objs-y) aio.o elf_aux.o execvp.o file.o helper.o irq.o \
 	main.o mem.o process.o registers.o sigio.o signal.o start_up.o time.o \
-	trap.o tty.o tls.o uaccess.o umid.o util.o
+	tty.o tls.o uaccess.o umid.o util.o
 
 CFLAGS_user_syms.o += -DSUBARCH_$(SUBARCH)
 
diff --git a/arch/um/os-Linux/aio.c b/arch/um/os-Linux/aio.c
index 93dc0c8..b8d8c9c 100644
--- a/arch/um/os-Linux/aio.c
+++ b/arch/um/os-Linux/aio.c
@@ -12,6 +12,7 @@
 #include "aio.h"
 #include "init.h"
 #include "kern_constants.h"
+#include "kern_util.h"
 #include "os.h"
 #include "user.h"
 
diff --git a/arch/um/os-Linux/drivers/tuntap_user.c b/arch/um/os-Linux/drivers/tuntap_user.c
index 1d84795..7739e29 100644
--- a/arch/um/os-Linux/drivers/tuntap_user.c
+++ b/arch/um/os-Linux/drivers/tuntap_user.c
@@ -14,6 +14,7 @@
 #include <sys/wait.h>
 #include <sys/uio.h>
 #include "kern_constants.h"
+#include "kern_util.h"
 #include "os.h"
 #include "tuntap.h"
 #include "user.h"
diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index c3bb5ce..9387cb1 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -17,7 +17,6 @@
 #include <sys/uio.h>
 #include "os.h"
 #include "user.h"
-#include "kern_util.h"
 
 static void copy_stat(struct uml_stat *dst, const struct stat64 *src)
 {
diff --git a/arch/um/os-Linux/irq.c b/arch/um/os-Linux/irq.c
index 6aa6f95..a26e066 100644
--- a/arch/um/os-Linux/irq.c
+++ b/arch/um/os-Linux/irq.c
@@ -11,7 +11,6 @@
 #include <sys/poll.h>
 #include <sys/types.h>
 #include <sys/time.h>
-#include "kern_util.h"
 #include "user.h"
 #include "process.h"
 #include "sigio.h"
diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c
index 9674ed1..eedc2d8 100644
--- a/arch/um/os-Linux/mem.c
+++ b/arch/um/os-Linux/mem.c
@@ -9,7 +9,6 @@
 #include <sys/types.h>
 #include <sys/mman.h>
 #include <sys/statfs.h>
-#include "kern_util.h"
 #include "user.h"
 #include "mem_user.h"
 #include "init.h"
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index 37302e8..7ff8f57 100644
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -9,6 +9,7 @@
 #include <errno.h>
 #include <signal.h>
 #include <strings.h>
+#include "kern_util.h"
 #include "os.h"
 #include "sysdep/barrier.h"
 #include "sysdep/sigcontext.h"
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index e8b7a97..765cfa6 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -15,6 +15,7 @@
 #include "as-layout.h"
 #include "chan_user.h"
 #include "kern_constants.h"
+#include "kern_util.h"
 #include "mem.h"
 #include "os.h"
 #include "process.h"
diff --git a/arch/um/os-Linux/skas/trap.c b/arch/um/os-Linux/skas/trap.c
index 3b1b924..a19a74f 100644
--- a/arch/um/os-Linux/skas/trap.c
+++ b/arch/um/os-Linux/skas/trap.c
@@ -3,22 +3,26 @@
  * Licensed under the GPL
  */
 
-#if 0
-#include "kern_util.h"
-#include "skas.h"
-#include "ptrace_user.h"
-#include "sysdep/ptrace_user.h"
-#endif
-
 #include <errno.h>
 #include <signal.h>
 #include "sysdep/ptrace.h"
 #include "kern_constants.h"
 #include "as-layout.h"
+#include "kern_util.h"
 #include "os.h"
 #include "sigcontext.h"
 #include "task.h"
 
+void (*sig_info[NSIG])(int, struct uml_pt_regs *) = {
+	[SIGTRAP]	= relay_signal,
+	[SIGFPE]	= relay_signal,
+	[SIGILL]	= relay_signal,
+	[SIGWINCH]	= winch,
+	[SIGBUS]	= bus_handler,
+	[SIGSEGV]	= segv_handler,
+	[SIGIO]		= sigio_handler,
+	[SIGVTALRM]	= timer_handler };
+
 static struct uml_pt_regs ksig_regs[UM_NR_CPUS];
 
 void sig_handler_common_skas(int sig, void *sc_ptr)
diff --git a/arch/um/os-Linux/trap.c b/arch/um/os-Linux/trap.c
deleted file mode 100644
index 2a1c984..0000000
--- a/arch/um/os-Linux/trap.c
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <signal.h>
-#include "os.h"
-#include "sysdep/ptrace.h"
-
-/* Initialized from linux_main() */
-void (*sig_info[NSIG])(int, struct uml_pt_regs *);
-
-void os_fill_handlinfo(struct kern_handlers h)
-{
-	sig_info[SIGTRAP] = h.relay_signal;
-	sig_info[SIGFPE] = h.relay_signal;
-	sig_info[SIGILL] = h.relay_signal;
-	sig_info[SIGWINCH] = h.winch;
-	sig_info[SIGBUS] = h.bus_handler;
-	sig_info[SIGSEGV] = h.page_fault;
-	sig_info[SIGIO] = h.sigio_handler;
-	sig_info[SIGVTALRM] = h.timer_handler;
-}
diff --git a/arch/um/os-Linux/tty.c b/arch/um/os-Linux/tty.c
index 4cfdd18..b09ff66 100644
--- a/arch/um/os-Linux/tty.c
+++ b/arch/um/os-Linux/tty.c
@@ -1,13 +1,16 @@
-/* 
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL
  */
 
 #include <stdlib.h>
+#include <unistd.h>
 #include <errno.h>
+#include <fcntl.h>
+#include "kern_constants.h"
+#include "kern_util.h"
 #include "os.h"
 #include "user.h"
-#include "kern_util.h"
 
 struct grantpt_info {
 	int fd;
@@ -26,36 +29,34 @@ static void grantpt_cb(void *arg)
 int get_pty(void)
 {
 	struct grantpt_info info;
-	int fd;
-
-	fd = os_open_file("/dev/ptmx", of_rdwr(OPENFLAGS()), 0);
-	if(fd < 0){
-		printk("get_pty : Couldn't open /dev/ptmx - err = %d\n", -fd);
-		return(fd);
+	int fd, err;
+
+	fd = open("/dev/ptmx", O_RDWR);
+	if (fd < 0) {
+		err = -errno;
+		printk(UM_KERN_ERR "get_pty : Couldn't open /dev/ptmx - "
+		       "err = %d\n", errno);
+		return err;
 	}
 
 	info.fd = fd;
 	initial_thread_cb(grantpt_cb, &info);
 
-	if(info.res < 0){
-		printk("get_pty : Couldn't grant pty - errno = %d\n", 
-		       -info.err);
-		return(-1);
+	if (info.res < 0) {
+		err = -info.err;
+		printk(UM_KERN_ERR "get_pty : Couldn't grant pty - "
+		       "errno = %d\n", -info.err);
+		goto out;
 	}
-	if(unlockpt(fd) < 0){
-		printk("get_pty : Couldn't unlock pty - errno = %d\n", errno);
-		return(-1);
+
+	if (unlockpt(fd) < 0) {
+		err = -errno;
+		printk(UM_KERN_ERR "get_pty : Couldn't unlock pty - "
+		       "errno = %d\n", errno);
+		goto out;
 	}
-	return(fd);
+	return fd;
+out:
+	close(fd);
+	return err;
 }
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/os-Linux/tty_log.c b/arch/um/os-Linux/tty_log.c
index d11a55b..cc648e6 100644
--- a/arch/um/os-Linux/tty_log.c
+++ b/arch/um/os-Linux/tty_log.c
@@ -12,7 +12,6 @@
 #include <sys/time.h>
 #include "init.h"
 #include "user.h"
-#include "kern_util.h"
 #include "os.h"
 
 #define TTY_LOG_DIR "./"